Lamp



FIG. 1 is a front elevational view of a lamp showing my new design;

FIG. 2 is a right hand side elevational view thereof;

FIG. 3 is a bottom plan view thereof;

FIG. 4 is a left hand side elevational view thereof;

FIG. 5 is a rear elevational view thereof;

FIG. 6 is a top plan view thereof. 

The ornamental design for a lamp, as shown and described. 